LQFP100 datasheet(79/116 Pages) STMICROELECTRONICS

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DocID14619 Rev 13

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SPC560B40x/50x, SPC560C40x/50x

Package pinouts and signal descriptions

115

3.25

Slow internal RC oscillator (128 kHz) electrical

characteristics

The device provides a 128 kHz slow internal RC oscillator. This can be used as the

reference clock for the RTC module.

tFIRCSU CC C

Fast internal RC oscillator start-up

time

VDD = 5.0 V ± 10%

—

1.1

2.0

µs



FIRCPRE CC T

Fast internal RC oscillator precision

after software trimming of fFIRC

TA = 25 °C

1—



FIRCTRIM CC T

Fast internal RC oscillator trimming

step

TA = 25 °C

—

1.6



FIRCVAR CC P

Fast internal RC oscillator variation

in over temperature and supply with

respect to fFIRC at TA = 25 °C in

high-frequency configuration

—

5—

VDD = 3.3 V ± 10% / 5.0 V ± 10%, TA = 40 to 125 °C, unless otherwise specified.

This does not include consumption linked to clock tree toggling and peripherals consumption when RC oscillator is ON.

Table 42. Fast internal RC oscillator (16 MHz) electrical characteristics (continued)

Symbol

Parameter

Conditions(1)

Value

Unit

Min

Typ

Max

Table 43. Slow internal RC oscillator (128 kHz) electrical characteristics

Symbol

Parameter

Conditions(1)

Value

Unit

Min

Typ

Max

fSIRC

CC P Slow internal RC oscillator low

frequency

TA = 25 °C, trimmed

—

128

—

kHz

SR —

—

100

—

150

ISIRC

(2)

CC C

Slow internal RC oscillator low

frequency current

TA = 25 °C, trimmed

—

µA

tSIRCSU

CC P

Slow internal RC oscillator start-up

time

TA = 25 °C, VDD = 5.0 V ±

10%

—

µs



SIRCPRE

CC C

Slow internal RC oscillator

precision after software trimming of

fSIRC

TA = 25 °C

2—



SIRCTRIM

CC C

Slow internal RC oscillator trimming

step

——

2.7

—



SIRCVAR

CC C

Slow internal RC oscillator variation

in temperature and supply with

respect to fSIRC at TA = 55 °C in

high frequency configuration

High frequency configuration

10

—

+10

VDD = 3.3 V ± 10% / 5.0 V ± 10%, TA = 40 to 125 °C, unless otherwise specified.

This does not include consumption linked to clock tree toggling and peripherals consumption when RC oscillator is ON.

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